I don't know. Metacontrarianism, as I understand it, involves taking specific positions solely for the sake of differentiating oneself from others, whereas many of the status quo explanations (e.g. Yvain's recent post on weak men) seem like they actually have definite intellectual merit as well.

My explanation would be more something like "LW was originally quite dominated by Eliezer's ideas, but over time and as people have had the time to think about them more, people have started going off in their own directions and producing new kinds of thoughts that are the kind of synthesis that you get when you've assimilated the LW canon deeply enough and then start combining it with all the other influences and ideas that you run into and think about in your life".